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Construction and Application of Online Calculation Model of Bleaching Operation Cost
Received:May 05, 2020  
DOI：10.11981/j.issn.1000-6842.2020.04.49
Key Words:ECF bleaching;modelling;cost analysis;optimization;online computation
Fund Project:广西清洁纸浆造纸与污染控制重点实验室开放项目（授权号ZR201905）；广西中青年能力增强计划（授权号2018KY0039）；广西科学技术研究院技术基金会（批准号2018JJA160015）；广西博世科环保科技股份有限公司国家企业技术中心开放基金项目。
Author NameAffiliationPostcode
CHEN Shaoxu* College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
MA Zhichao College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
YIN Yongjun College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
ZHAN Lei Guangxi Bossco Environmental Protection Technology Co.， Ltd.， Nanning， Guangxi Zhuang Autonomous Region， 530007 530007
LIN Tingting College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
LU Xiaodan College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
ZHOU Yanying College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
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Abstract:
      Increasing of energy and chemical prices makes the pulp producers pay more attention to how to reduce the bleaching cost particularly. An online bleaching operation cost calculation model of bleaching process was established and applied to the typical ECF bleaching technology （D0EpPD1）. The main factors affecting bleaching operation cost were systematically analyzed， also the application result of the model in optimization of the bleaching process was presented. It was found that chemical cost was the most important factor affecting the ope-ration cost of bleaching， followed by energy cost， water treatment cost and clean water cost. Among chemicals， the consumption of ClO2 had the greatest influence on the bleaching cost， followed by the consumption of H2O2 and NaOH. Steam consumption affected the cost most as an energy cost， but the price of clean water and the cost of wastewater treatment had the least influence on the cost of bleaching. Bleaching cost can be reduced by adjusting the amount of chemicals and bleaching condition. The model could be used to predict bleaching operation cost online if process conditions or the prices of energy and chemicals changed， which was considered as the basis of the global optimization and further reducing the cost in bleaching process.
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